Synthesis, β-hematin inhibition studies and antimalarial evaluation of dehydroxy isotebuquine derivatives against Plasmodium berghei
作者:Angel H. Romero、María E. Acosta、Neira Gamboa、Jaime E. Charris、José Salazar、Simón E. López
DOI:10.1016/j.bmc.2015.05.040
日期:2015.8
Diverse dehydroxy-isotebuquine derivatives were prepared by using a five step synthetic sequence in good yields. All these new 4-aminoquinolines were evaluated as inhibitors of haemozoin formation, where most of them showed a significant inhibition value (% IHF >97). The best inhibitors were tested in vivo as potential antimalarials in mice infected with Plasmodium berghei ANKA chloroquine susceptible strain, three of them (11b, 11d and 11h) displayed an antimalarial activity comparable to that of chloroquine. (C) 2015 Elsevier Ltd. All rights reserved.
Identification of dehydroxy isoquine and isotebuquine as promising antileishmanial agents
作者:Angel H. Romero、Noris Rodríguez、Simón E. López、Henry Oviedo
DOI:10.1002/ardp.201800281
日期:2019.5
in vitro evaluation of a series of dehydroxyisoquines and isotebuquines against two Leishmania parasites such as Leishmania braziliensis and Leishmania mexicana. First, the antiproliferative activity of the quinolines was studied against the promastigote forms of L. braziliensis and L. mexicana parasites, finding that five of them exhibited good antileishmanial responses with micromolar IC50 values
基于 4-氨基喹啉的传统抗疟药对利什曼原虫表现出良好的抗增殖活性;然而,它们的临床应用目前有限。为了确定新的 4-氨基喹啉以对抗美国皮肤利什曼病,我们对一系列脱羟基异喹啉和异特布喹对两种利什曼原虫寄生虫(如巴西利什曼原虫和墨西哥利什曼原虫)进行了全面的体外评估。首先,研究了喹啉对 L. braziliensis 和 L. mexicana 寄生虫的前鞭毛体形式的抗增殖活性,发现其中五种表现出良好的抗利什曼原虫反应,微摩尔 IC50 值范围为 3.84 至 10 μM。构效关系分析表明,作为 N-烷基氨基末端取代基连接的哌啶或吗啉以及连接在异特布喹核心苯胺环上的额外苯环构成了重要的药效团,可产生最具活性的衍生物,其抗利什曼原虫反应远远优于参考药物葡聚糖时间。所有化合物对人真皮成纤维细胞的毒性相对较低,CC50 范围为 69 至 >250 μM。与参考药物相比,五种最活跃的化合物对巴西 L.